US6874779B2 - Paper separating guide of paper feeding cassette for printing - Google Patents

Paper separating guide of paper feeding cassette for printing Download PDF

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Publication number
US6874779B2
US6874779B2 US10/426,798 US42679803A US6874779B2 US 6874779 B2 US6874779 B2 US 6874779B2 US 42679803 A US42679803 A US 42679803A US 6874779 B2 US6874779 B2 US 6874779B2
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US
United States
Prior art keywords
papers
paper
friction coefficient
separating guide
cassette
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US10/426,798
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English (en)
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US20040026845A1 (en
Inventor
Gyeong-ho Park
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hewlett Packard Development Co LP
Original Assignee
Samsung Electronics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Samsung Electronics Co Ltd filed Critical Samsung Electronics Co Ltd
Assigned to SAMSUNG ELECTRONICS CO., LTD. reassignment SAMSUNG ELECTRONICS CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: PARK, GYEONG-HO
Publication of US20040026845A1 publication Critical patent/US20040026845A1/en
Application granted granted Critical
Publication of US6874779B2 publication Critical patent/US6874779B2/en
Assigned to S-PRINTING SOLUTION CO., LTD. reassignment S-PRINTING SOLUTION CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SAMSUNG ELECTRONICS CO., LTD
Assigned to HP PRINTING KOREA CO., LTD. reassignment HP PRINTING KOREA CO., LTD. CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: S-PRINTING SOLUTION CO., LTD.
Assigned to HP PRINTING KOREA CO., LTD. reassignment HP PRINTING KOREA CO., LTD. CORRECTIVE ASSIGNMENT TO CORRECT THE DOCUMENTATION EVIDENCING THE CHANGE OF NAME PREVIOUSLY RECORDED ON REEL 047370 FRAME 0405. ASSIGNOR(S) HEREBY CONFIRMS THE CHANGE OF NAME. Assignors: S-PRINTING SOLUTION CO., LTD.
Assigned to HP PRINTING KOREA CO., LTD. reassignment HP PRINTING KOREA CO., LTD. CHANGE OF LEGAL ENTITY EFFECTIVE AUG. 31, 2018 Assignors: HP PRINTING KOREA CO., LTD.
Assigned to HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. reassignment HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. CONFIRMATORY ASSIGNMENT EFFECTIVE NOVEMBER 1, 2018 Assignors: HP PRINTING KOREA CO., LTD.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H3/00—Separating articles from piles
    • B65H3/02—Separating articles from piles using friction forces between articles and separator
    • B65H3/06—Rollers or like rotary separators
    • B65H3/0684—Rollers or like rotary separators on moving support, e.g. pivoting, for bringing the roller or like rotary separator into contact with the pile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H3/00—Separating articles from piles
    • B65H3/46—Supplementary devices or measures to assist separation or prevent double feed
    • B65H3/52—Friction retainers acting on under or rear side of article being separated
    • B65H3/5207—Non-driven retainers, e.g. movable retainers being moved by the motion of the article
    • B65H3/5215—Non-driven retainers, e.g. movable retainers being moved by the motion of the article the retainers positioned under articles separated from the top of the pile
    • B65H3/5223—Retainers of the pad-type, e.g. friction pads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H3/00—Separating articles from piles
    • B65H3/46—Supplementary devices or measures to assist separation or prevent double feed
    • B65H3/56—Elements, e.g. scrapers, fingers, needles, brushes, acting on separated article or on edge of the pile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/50—Surface of the elements in contact with the forwarded or guided material
    • B65H2404/52—Surface of the elements in contact with the forwarded or guided material other geometrical properties
    • B65H2404/521—Reliefs
    • B65H2404/5213—Geometric details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/50—Surface of the elements in contact with the forwarded or guided material
    • B65H2404/53—Surface of the elements in contact with the forwarded or guided material with particular mechanical, physical properties
    • B65H2404/531—Surface of the elements in contact with the forwarded or guided material with particular mechanical, physical properties particular coefficient of friction
    • B65H2404/5311—Surface with different coefficients of friction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2405/00—Parts for holding the handled material
    • B65H2405/10—Cassettes, holders, bins, decks, trays, supports or magazines for sheets stacked substantially horizontally
    • B65H2405/11—Parts and details thereof
    • B65H2405/113—Front, i.e. portion adjacent to the feeding / delivering side
    • B65H2405/1136—Front, i.e. portion adjacent to the feeding / delivering side inclined, i.e. forming an angle different from 90 with the bottom
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/10—Size; Dimensions
    • B65H2511/15—Height, e.g. of stack
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2515/00—Physical entities not provided for in groups B65H2511/00 or B65H2513/00
    • B65H2515/30—Forces; Stresses

Definitions

  • the present invention relates to a printing apparatus which feeds a printing paper using a paper feeding cassette, and in particular, to a printing apparatus which uses a dam type paper feeding cassette in such a manner that a printing paper is separated and fed using a paper separating guide.
  • a printing apparatus such as an ink jet printer, laser printer, copy machine, etc.
  • a paper feeding apparatus which is capable of continuously printing a plurality of printing papers to implement a continuous printing operation.
  • a dam type paper feeding cassette is used as one type of the continuous paper feeding apparatus.
  • This type of paper feeding cassette uses a paper separating guide.
  • FIG. 1 is a view illustrating an example of a paper feeding cassette for a dam type printing apparatus.
  • the paper feeding cassette includes a cassette 10 , a pick-up roller 30 , a picking arm 20 and a paper separating guide 40 .
  • the cassette 10 stacks a plurality of printing papers 1 therein and is installed in a body (not shown) of the printing apparatus.
  • a pad 11 is installed in a bottom of the cassette 10 to transfer the last printing paper 3 .
  • the pick-up roller 30 is installed in an upper portion of the cassette 10 and pressurizes the printing papers 1 stacked in the cassette 10 and rotates to thereby transfer the printing papers 1 in a direction of the paper separating guide 40 .
  • the picking arm 20 is installed in such a manner that one end 21 thereof is rotatable with respect to the body of the printing apparatus, and the other end is connected to a shaft of the pick-up roller 30 .
  • the pick-up roller 30 continuously pressurizes the printing papers 1 .
  • the picking arm 20 includes a driving force transferring unit (not shown) that receives a driving force from a driving source (not shown), such as a motor installed in the body, and transfers the received driving force to the pick-up roller 30 . Therefore, the pick-up roller 30 is rotatable in a state in which an upper surface of the printing papers 1 is pressurized.
  • the paper separating guide 40 is installed in the forward part of the cassette 10 and is installed in such a manner that the paper separating guide 40 is inclined in a transferring direction of the printing papers 1 .
  • a surface 41 of the paper separating guide 40 has a friction coefficient associated therewith.
  • An uppermost printing paper 2 receives the picking force from the pick-up roller 30 , which is greater than the friction force, thereby allowing transfer of the paper 2 .
  • the printing papers 1 which are placed below the uppermost printing paper 2 and have a picking force which is smaller than the friction force of the paper separating guide 40 , are not transferred over the paper separating guide 40 .
  • a driving force is transferred to the pick-up roller 30 through the picking arm 20 .
  • the picking arm 20 is rotated downward with respect to an engaging portion of the body of the printing apparatus, and the pick-up roller 30 presses on an upper surface of the uppermost sheet of printing paper 2 of the cassette 10 .
  • the engaging portion attaches to the end 21 of the picking arm 20 .
  • the uppermost sheet of the printing paper 2 is transferred to the paper separating guide 40 by the friction force and rotation of the pick-up roller 30 .
  • a plurality of printing papers 1 are transferred in the direction of the paper separating guide 40 by the pick-up roller 30 .
  • only the uppermost printing paper 2 has a transfer force from the pick-up roller 30 which is larger than a friction force applied by the paper separating guide 40 .
  • only the uppermost printing paper 2 is transferred to the body of the printing apparatus via the paper separating guide 40 .
  • the transferring forces of the printing papers 1 are smaller than the friction force of the paper separating guide 40 , the printing papers 1 do not pass through the paper separating guide 40 . Therefore, the printing papers 1 stacked in the cassette 10 are separated one by one, and the separated paper is fed to the body of the printing apparatus.
  • the stacking height H of the printing papers 1 is decreased.
  • the picking arm 20 is rotated downward, so that the pick-up roller 30 maintains close contact with an upper surface of the printing paper 2 .
  • the uppermost printing paper 2 is continuously fed to the body of the printing apparatus through the paper separating guide 40 .
  • the above picking error occurs when the paper transferring force of the pick-up roller 30 , namely, the picking force, is smaller than the friction force of the paper separating guide 40 .
  • the transferring force applied to the printing papers 1 changes based on the stacked height H of the printing papers 1 .
  • the friction force applied to the printing papers 1 by the paper separating guide 40 is determined based on a surface friction coefficient of the paper separating guide 40 and the type of paper used. Therefore, if the types of the printing papers 1 are the same, the friction force is the same irrespective of the stacked height H.
  • Line C in FIG. 3 illustrates a friction force of the paper separating guide 40 applied to a thin paper (for example, 60 g/m 2 ).
  • Line B in FIG. 3 illustrates a friction of the paper separating guide 40 applied to a thick paper (for example, 105 g/m 2 ).
  • portion X in which the height of the printing papers 1 stacked in the cassette is high, the friction force of the paper separating guide 49 is larger than the picking force of the pick-up roller 30 . In this case, a picking error in which the printing paper is not transferred by the pick-up roller may occur.
  • the surface friction coefficient of the paper separating guide 40 can be decreased.
  • the paper is thin or has a lot of static electricity, the uppermost printing paper 2 is not properly separated, and multiple sheets of the printing papers are fed at once. Therefore, it is difficult to employ the paper separating guide 40 in the printing apparatus in which various types of printing papers are used.
  • a surface friction coefficient is different based on a contact position of an end of a printing paper.
  • a friction coefficient of the paper separating guide differs linearly or step by step based on the contact position.
  • a friction coefficient for a paper at the bottom of a cassette is largest.
  • the minimum value of the friction coefficient is smaller than a force needed to transfer an uppermost printing paper when the maximum amount of the thickest possible printing paper is stacked in the cassette.
  • the friction coefficient is determined based on heights of protrusions formed on a surface of the paper separating guide.
  • a paper feeding cassette for a printing apparatus including a cassette to stack a plurality of printing papers therein; a paper separating guide which is installed in the cassette and has a variable surface friction coefficient based on contact positions of the printing papers; and a pick-up roller which is rotated based on a height of the stacked printing papers, whereby the printing papers are transferred to the paper separating guide by the rotation of the pick-up roller by being separated one by one by a friction between the paper separating guide and the papers, a magnitude of the friction being determined by the friction coefficient.
  • FIG. 1 is a perspective view illustrating a paper feeding cassette for a printing apparatus having a conventional paper separating guide
  • FIG. 2 is a view illustrating a track of a pick-up roller which is changed based on a stacked height of a printing paper in the paper feeding cassette of FIG. 1 ;
  • FIG. 3 is a graph for describing a change of a picking force based on a position of the pick-up roller in the paper feeding cassette of FIG. 2 ;
  • FIG. 4 is a cross-sectional view illustrating a paper feeding cassette for a printing apparatus having a paper separating guide according to an embodiment of the present invention
  • FIGS. 5A and 5B are a plan view and side view, respectively, illustrating the paper separating guide of FIG. 4 ;
  • FIG. 6 is a view illustrating an example of a change of a friction force based on a stacked height of a printing paper of the paper separating guide of FIG. 4 ;
  • FIG. 7 is a view illustrating another example of a change of a friction force based on a stacked height of a printing paper of the paper separating guide of FIG. 4 .
  • the paper feeding cassette for a printing apparatus includes a cassette 100 , a pick-up roller 300 , a picking arm 200 and a paper separating guide 500 .
  • the cassette 100 stacks a plurality of printing papers 101 therein and is installed in a body (not shown) of the printing apparatus.
  • a pad 110 is provided in a bottom of the cassette 100 to transfer a last printing paper 102 .
  • the pick-up roller 300 is installed in an upper portion of the cassette 100 and puts pressure on the printing papers 101 stacked in the cassette 100 , and rotates to thereby transfer the printing papers 101 in a direction of the paper separating guide 500 .
  • the picking arm 200 is installed in such a manner that one end thereof (not shown) is rotatable with respect to the body of the printing apparatus, and the other end is connected to a shaft of the pick-up roller 300 . Therefore, when the height H of the printing papers 101 stacked in the cassette 100 is changed, since the pick-up roller 300 is rotated with respect to the end of the picking arm 200 , the pick-up roller 300 is capable of continuously putting pressure on the printing papers 101 .
  • the picking arm 200 includes a driving force transferring unit (not shown) to receive a driving force from a driving source (not shown), such as a motor installed in the body and to transfer the force to the pick-up roller 300 . Therefore, the pick-up roller 300 rotates in a state in which the printing papers 101 receive pressure.
  • the paper separating guide 500 is installed in the forward part of the cassette 100 and is installed in such a manner that the paper separating guide 500 is inclined at a certain angle with respect to the cassette 100 .
  • the surface of the paper separating guide 500 is formed in such a manner that a friction coefficient may differ based on the contact position of the printing papers 101 , namely, the stacked height H of the printing papers.
  • a surface friction coefficient of the paper separating guide 500 is linearly changed based on the position of the printing papers 101 (FIG. 6 ).
  • a constant friction coefficient may be formed at a regular interval, namely, in a step shape.
  • the surface friction coefficient of the paper separating guide 500 is formed in such a manner that the friction coefficient of the portion contacting the printing paper 103 positioned at the bottom of the cassette 100 is maximized.
  • a plurality of small protrusions 51 are formed on a surface of the paper separating guide 500 . As shown in FIGS. 5A and 5B , a largest protrusion is formed at a lower side of the paper separating guide 500 . The sizes of the protrusions 51 are sequentially decreased at a regular interval to thereby decrease the friction coefficients.
  • a driving force is transferred to the pick-up roller 300 through the picking arm 200 .
  • the picking arm 200 is rotated downward with respect to the engaging portion of the body of the printing apparatus, and the pick-up roller 300 pressurizes an upper surface of the uppermost printing paper 102 , which is positioned in the cassette 100 .
  • the engaging portion is similar to that shown in FIG. 1 .
  • the uppermost printing paper 102 is transferred to the paper separating guide 500 by a friction force of the pick-up roller 300 and a transferring force based on the rotation of the same.
  • a plurality of the printing papers 101 are transferred in a direction of the paper separating guide 500 by the pick-up roller 300 .
  • only the uppermost printing paper 102 in which the transferring force is larger than the friction force is transferred to the body of the printing apparatus through the paper separating guide 500 .
  • the transferring forces of the printing papers placed below the uppermost printing paper 102 are smaller than the friction force, these papers do not pass through the paper separating guide 500 . Therefore, the printing papers 101 of the paper stack in the cassette 100 are separated sheet by sheet, and thus, each separated printing paper sheet is transferred to the body of the printing apparatus.
  • FIG. 6 shows the change of the friction force by the paper separating guide 500 (lines D and E) according to the height of the paper stack and a change of the transfer force (picking force) of a printing paper by the pick-up roller 300 (line A), based on an assumption that papers in thickness varying from maximum 105 g/m 2 to minimum 60 g/m 2 are used.
  • line D represents a friction force curve of the thick printing paper (105 g/m 2 )
  • E represents a friction force curve of a thin printing paper (60 g/m 2 ).
  • the picking arm 200 is rotated in a lower direction based on the stacked height H of the printing paper, and the pick-up roller 300 transfers the printing paper 101 to the paper separating guide 500 .
  • the picking error is prevented when the thick printing papers are in use, and the simultaneous feeding of multiple sheets of printing paper is also prevented when the thin printing papers are in use.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
US10/426,798 2002-08-07 2003-05-01 Paper separating guide of paper feeding cassette for printing Expired - Lifetime US6874779B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2002-0046655A KR100461589B1 (ko) 2002-08-07 2002-08-07 인쇄장치용 급지카세트의 용지분리가이드
KR2002-46655 2002-08-07

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US20040026845A1 US20040026845A1 (en) 2004-02-12
US6874779B2 true US6874779B2 (en) 2005-04-05

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Country Status (4)

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US (1) US6874779B2 (ko)
JP (1) JP3692129B2 (ko)
KR (1) KR100461589B1 (ko)
CN (1) CN1257805C (ko)

Cited By (9)

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US20040251612A1 (en) * 2003-06-13 2004-12-16 Samsung Electronics Co., Ltd. Paper cassette for printing apparatus
US20050040588A1 (en) * 2003-08-19 2005-02-24 Chang Deuk-Hwan Paper feeding apparatus for printing machine
US20070132172A1 (en) * 2005-12-13 2007-06-14 Hewlett-Packard Development Company, L.P. Separator
US20070182086A1 (en) * 2006-02-09 2007-08-09 Lexmark International, Inc. Methods and devices for controlling a leading edge of a media sheet in an image forming device
US20070253037A1 (en) * 2006-04-28 2007-11-01 Hewlett-Packard Development Company Lp Separator
US20080230979A1 (en) * 2007-03-23 2008-09-25 Brother Kogyo Kabushiki Kaisha Sheet Feder
US20090091073A1 (en) * 2007-10-03 2009-04-09 Pitney Bowes Inc. Ingestion guide assembly for augmenting sheet material separation in a singulating apparatus
US20110074093A1 (en) * 2009-09-30 2011-03-31 Brother Kogyo Kabushiki Kaisha Sheet feeder and image recording apparatus
US11299364B2 (en) 2018-05-15 2022-04-12 Hewlett-Packard Development Company, L.P. Paddle roller rotations

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JP4284542B2 (ja) * 2005-01-26 2009-06-24 ブラザー工業株式会社 給紙装置
JP4732258B2 (ja) * 2006-07-07 2011-07-27 キヤノン株式会社 給紙装置及び画像形成装置
JP4650640B2 (ja) * 2007-03-26 2011-03-16 ブラザー工業株式会社 給紙装置
JP4650641B2 (ja) * 2007-03-27 2011-03-16 ブラザー工業株式会社 給紙装置及びそれを備えた画像記録装置
KR200457752Y1 (ko) * 2008-12-02 2012-01-02 다폰 일렉트로닉스 코퍼레이션 변압기 및 백라이트 장치
JP4687805B2 (ja) * 2009-03-26 2011-05-25 ブラザー工業株式会社 給紙トレイ、この給紙トレイを有する給紙装置およびこの給紙装置を有する画像記録装置
JP2011073835A (ja) * 2009-09-30 2011-04-14 Brother Industries Ltd シート搬送装置及び画像記録装置
JP2011073830A (ja) * 2009-09-30 2011-04-14 Brother Industries Ltd シート搬送装置及び画像記録装置
JP5854696B2 (ja) * 2011-08-18 2016-02-09 キヤノン株式会社 給紙装置、および記録装置
JP5899708B2 (ja) * 2011-08-29 2016-04-06 セイコーエプソン株式会社 媒体給送装置、記録装置
JP5928082B2 (ja) * 2012-03-29 2016-06-01 ブラザー工業株式会社 給送装置
US9166959B2 (en) * 2012-03-31 2015-10-20 Intel Corporation Secure communication using physical proximity
JP6198525B2 (ja) * 2012-08-30 2017-09-20 キヤノン株式会社 給送装置及び給送装置を備えた記録装置
JP6322902B2 (ja) * 2013-05-17 2018-05-16 ブラザー工業株式会社 給送装置及び画像記録装置
JP6122826B2 (ja) * 2014-11-14 2017-04-26 株式会社小矢部精機 シート材分離補助装置

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US6536757B2 (en) * 2000-05-12 2003-03-25 Samsung Electronics Co., Ltd. Sheet separator in a printer
JP2002173239A (ja) 2000-12-07 2002-06-21 Brother Ind Ltd 給紙装置
JP2004026369A (ja) 2002-06-24 2004-01-29 Toshiba Tec Corp シート給紙装置

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040251612A1 (en) * 2003-06-13 2004-12-16 Samsung Electronics Co., Ltd. Paper cassette for printing apparatus
US20050040588A1 (en) * 2003-08-19 2005-02-24 Chang Deuk-Hwan Paper feeding apparatus for printing machine
US7513495B2 (en) * 2005-12-13 2009-04-07 Hewlett-Packard Development Company, L.P. Separator
US20070132172A1 (en) * 2005-12-13 2007-06-14 Hewlett-Packard Development Company, L.P. Separator
US20070182086A1 (en) * 2006-02-09 2007-08-09 Lexmark International, Inc. Methods and devices for controlling a leading edge of a media sheet in an image forming device
US20070253037A1 (en) * 2006-04-28 2007-11-01 Hewlett-Packard Development Company Lp Separator
US7852526B2 (en) * 2006-04-28 2010-12-14 Hewlett-Packard Development Company, L.P. Separator
US20080230979A1 (en) * 2007-03-23 2008-09-25 Brother Kogyo Kabushiki Kaisha Sheet Feder
US7988143B2 (en) 2007-03-23 2011-08-02 Brother Kogyo Kabushiki Kaisha Sheet feeder
US20090091073A1 (en) * 2007-10-03 2009-04-09 Pitney Bowes Inc. Ingestion guide assembly for augmenting sheet material separation in a singulating apparatus
US7806398B2 (en) * 2007-10-03 2010-10-05 Pitney Bowes Inc. Ingestion guide assembly for augmenting sheet material separation in a singulating apparatus
US20110074093A1 (en) * 2009-09-30 2011-03-31 Brother Kogyo Kabushiki Kaisha Sheet feeder and image recording apparatus
US8684349B2 (en) * 2009-09-30 2014-04-01 Brother Kogyo Kabushiki Kaisha Sheet feeder and image recording apparatus
US11299364B2 (en) 2018-05-15 2022-04-12 Hewlett-Packard Development Company, L.P. Paddle roller rotations

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KR100461589B1 (ko) 2004-12-14
KR20040013645A (ko) 2004-02-14
JP3692129B2 (ja) 2005-09-07
US20040026845A1 (en) 2004-02-12
JP2004067389A (ja) 2004-03-04
CN1475362A (zh) 2004-02-18
CN1257805C (zh) 2006-05-31

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